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Hybrid metal halides with tunable photoluminescence (PL) properties have emerged as a novel light-emitting material. Hybrid manganese halides are especially attractive due to the eco-friendly and highly emissive advantages. However, the PL tunability induced by structural modulation in manganese halides has rarely been investigated. Herein, a new one-dimensional (1D) hybrid manganese chloride, (4AMP) 4 ClMn 3 Cl 13 ·HCl (4AMP = 4-(aminomethyl)pyridinium), where the corner-sharing octahedral manganese chloride chains of Mn 3 Cl 13 7– ∞ are surrounded by organic cations, has been prepared. The addition of Zn 2+ ions into precursor solution results in the formation of zero-dimensional (0D) single crystals of (4AMP)Zn 1– x Mn x Cl 4 ·H 2 O ( x = 0–1) with isolated Zn 1– x Mn x Cl 4 2– tetrahedral geometry. This structural transformation leads to the PL conversion from red to green emission with an increase of photoluminescence quantum yield (PLQY) from 4.9% to 12.7%. Moreover, the incorporation of other transition metal ions (e.g., Zn 2+, Co 2+, and Cu 2+ ) reveals the concentration-dependent structure modulation, where the 1D to 0D structure transformations are achieved upon the introduction of these transition metal ions at high concentrations. This work provides a new strategy to modulate the structure and luminescence in manganese halides with tunable PL properties, which could be expanded to other hybrid metal halides.
Tan et al. (2021) studied this question.